Fire-pot construction



1 1,639,938, 1927 o. J. GROEHN ET AL FIRE POT CONSTRUCTION Filed Jan.12.l925 Sheets-Sheet 1 INVENTORS Otta J 6m: k2: William 32451240352 1ATTORNEYIS:

1927' 0. J. GROEHN ET AL FIRE POT CONSTIEUCTION Filed Jan.12. 1925 2Sheets-Sheet 2 7 INVENTORS 1m w 5% a w.

Patented Aug. 23, 1927.

UNITED STATES PATENT OFFICE.

oTTo J. enonnn AND WILLIAM BLAsKEw'ITz, or DETROIT, MICHIGAN, AssfenonsTo oLAYTon &'LA BnnT MANUF CTURING COMPANY, or DETROIT, MICHIGAN, A

CORPORATION OF MICHIGAN.

FIRE-POT CONSTRUCTION;

Application filed January The invention relates to fire pots and refersmore particularly to fire pot constructions such as are adapted forplumbers use or where other uses for oil burning devices of thischaracter are desired.

One of the objects of the invention is to provide a fire potconstruction which is of simple construction and readily assembled. Afurther feature includes the provision of a side feed preventing heatconduction from the burner to the fuel tank. Heretofo-re, the feed tubesextended directly upwardly from the tank to the burner oftenrequiringthe feed tube to be made of an expensive material resistingheat conduction. WVith our invention ordinary piping may be employed forthe feed tube, the arrangement being such as to avoid heat conductionfrom the burner to the tank.

A further feature of the invention resides inprovision of an inductionchamber having asediment 'trap provided with a clean out plug, thearrangemen-tbeing such that the fuel duringits passage to the burner iskept separate from the sediment instead of passing .elirectlythrough itas is the common construction heretofore; By providing the sediment trapa cheap grade of fuel such as kerosene, or other hydrocarbon, maybeemployed and at the same time small jet may be used for the fuel, thesediment trap collecting the foreign matter and carbon deposits of thefuel and preventing clogging of the burner jet. I

it further objectionable feature in the constructions offire potsheretofore resided in the fact that after using the fire pots theresidue of unburned fuel-carbonized in the induction chamber and burnerdue to the combustion chamber heat. WVhen such fire potswere later usedthe carbonized fuel interfered with the operationof the burner, cloggingthe same and otherwise preventing ready passage of clean fuel to thebu-rner.-

The present invention avoids such diffic'ulties in that the sedimenttrap collects any carbonized fuel. i

A further feature of the invention lies in the provision'of a novelhandleconstruction for supportingsolderingirons or other tools.

ith these and other objects in-view, the invention resides in the novelfeatures of construction and combination and arrange- 12, 1925. Serialraises.

merits of parts as more fully hereinafter described and claimed. 7

Referring to the drawings I'.'

Figure 2 is a plan view thereof; Figure 3 is a detail fragmentary viewshowing the handle'construction when employed for lifting purposes;Figure 4 is acorresponding view showing the handle in. another positionwhen employed as a tool support;

Figure 5 is a plan of the induction chamher and burner, and

FigureG is a section' along the line 66 of. Figure 5; the'burner beingswung into the plane ofthesection 66 for purpose.

of illustrating the burner in cross section.

In the drawings reference character 10 indicates the tank of a fire pothaving the usual filler 10 pump 11 and supporting standard 12 which aresecured to the spider.

13 carried by the tanlrlO. The standards 12 removably carry the plateltwhich in turn carries the shield 15 which is removably secured to thepot supports 16 by reason of the overhanging portions 17 thereof.

Carried by the plate 1% at diametrically opposite sides thereof are thelugs 18 having the reduced bearing portions 19 engageable bythe slots 20of the handle. 21. The plate lat is also provided with the hook rests22v which cooperate with the handle 21 to sup port the same insubstantially horizontal position as shown in Figure ii: for support-.ing tools while being heated by the burner. -When so used the shield'15. is preferably removed by. giving to ita: partial rotationsufiiciently'toialign the recesses 23. with the supports 16 at which.time the shield 15 may be lifted vertically off the plate 14] Thesupports-16 may receive a pot (not shown) for meltingleadand the like.

For carrying'the the pot the handle 21 may be positioned vertically asshown in Figure 3. By re'ason'of the slots 20, in this latterposition,the polygonal head 24 enters the correspondingly shaped portions25 ofthe handle which prevents swinging of the I fire pot relatively. to thehandle. To place thehandle in the horizontal position it is only:necessary to allow it to drop vertically sufliciently to free the head-24 from the portion 25, slots permitting such vertical movement,whereupon the handle may be rotated about the bearing portions 19 intosupporting engagement, with the hook rests Extending axially upwardlyabove the tank 10 is the combustion device comprising the frustoconicalcombustion mixing chamber 26 preferably having perforations 27 and theinduction chamber 28 having the sediment trap 29 normally closed at itslower end with the clean out plug 30 and communicating at a pointthroughout its length with the fuel feed pipe 31 which extendshorizontally away from the induction chamber and is then bent at toextend downwardly into the tank 10. By reason of this construction itwill be noted that the feed pipe 31 is positioned to one side andconsequently remotely of the combustion chamber and induction chamber. Asuitablevalve regulable by handle 32 may control the supply of fuel tothe induction chamber. The latter chamber communicates at its upper endwith a fuel passage leading to the burner 34 provided with the jet Theparts preferably have screw threaded engagement as shown to afford readytaking apart for cleaning purposes. The opening 35 is axially alignedwith the combustion chamber 26.

Supported by the spider 18 is a detachable shield 36 which may surroundthe burner and combustion chamber.

In operation the fuel passes through the feed pipe 31 into the inductionchamber 28 where it is vaporized by the heat from the combustion chamber26. The vaporized fuel passes through the passage 33 and thence throughthe burner jet 35, leaving behind in the trap 29 any sediment. Thefuelfrom jet 25 entrains air and combustion takes place within thechamber 26. After use any carbonization caused in the induction chamberwill be collected in the sediment trap 29 which may be cleaned byremoval of the plug 80. It will also be noted that the fuel does notpass through the sediment trap but is introduced into the. inductionchamber at a point above the trap. Such provisions affording a cleanfuel and unobstructed passages therefor result in a more perfectcombustion and permit the use of the small burner jet 35. It will alsobe noted that a convenient tool rest is afforded by the handle slidablyengaging the bearings 19 and adapted to be swung'into a horizontal supported position. Furthermore, it will be noted that the fire pot may bereadily as- SGIIlbiGCl and disassembled.

While it is believed that from the foregoing description, the nature andadvantage of our invention will be readily understood, we desire to haveit understood that we do not limit ourselves to what is herein shownfuel tank and combustion chamber of a 3,.

vaporizing chamber immediately adjacent the combustion chamber providedwith a sediment trap and a fuel feed pipe connecting the tank andvaporizing chamber at a point above the said trap.

3. in a fire pot the combination with a fuel tank and combustion chamberof a vaporizing chamber adjacent the combustion chamber, a burnerpositioned below the combustion chamber and vaporizing chamber.

a communication between said burner and the upper portion of thevaporizing chamber, a sediment trap formed at the lower portion of thevaporizing chamber and a fuel feed pipe between said tank and vaporizingchamber. 7

l. In a fire pot, the combination with a fuel tank and combustionchamber, of a vertically positioned vaporizing chamber imme diatelyadjacent the combustion chamber, a burner positioned below thecombustion chamber, a communication between said.

burner and theupper portion of the vaporizing chamber, a sediment trapformed at,

the lower portion of the vaporizing chamher, and a fuel feedrpipebetween said tank and vaporizing chamber communicating with the latterchamber at a point inter1nediate the length thereof.

5. In a fire pot the combination with a fuel tank and combustion chamberof a vaporizing chamber immediately adjacent the combustion, chamber, aburner positioned below the combustionchamber and the vaporizingchamber, a communication between said burner and the upper portion of"the VELPOIIZIHO chamber, asediment trap.

formed at the lower portion of the vapor izingchamber and a fuel feedpipe between said tank and vaporizing chamber communicating withthelatter chamber at a point intermediate the length thereof, said fuelfeed pipe having a horizontally extending portion communicating with thevaporizing chamber.

6. In a fire pot, the combination with a source of fuel. of a combustionchamber, means for feeding fuel from said source of supply to theburner, said means including a chamber for preheating the fuel and asediment trap in the said chamber for collecting sediment and the likefrom the fuel.

7. In a fire pot the combination with a source of fuel of a combustionchamber, means for feeding fuel from said supply to the burner includingmeans for preheating the fuel and means'adjacent said preheating meansfor removing sediment and the like during the preheating of the fuel.

8. In a fire pot, the combination with a fuel tank, combustion chamberand burner, of a combined vaporizing and sediment removing chamberadjacent the combustion chamber, a fuel feed pipe connecting the tankwith the vaporizing and sediment removing chamber, and a conduitconnecting the said last named chamber with the burner.

9. In a fire pot, the combination with a fuel tank combustion chamberand burner, of a combined vaporizing and sediment removing chamber incontact with but outside of the said combustion chamber, a fuel feedpipe connecting the tank with the said vaporizing and sediment removingchamber and a conduit connecting said last named chamber with theburner.

10. In a fire pot, the combination with a fuel tank and combustionchamber of a combined vaporizing and sediment removing chamber adjacentthe combustion chamber and a plug removably mounted in the base of thesaid vaporizing and sediment removing chamber adapted to be removed forgiving access to the same.

11. In a fire pot, the combination with a fuel tank, of a combustionchamber arranged above the fuel tank, a vertically-positioned vaporizingchamber immediately adjacent the combustion chamber, a fuel feed pipeextending upwardly from the fuel tank and provided with a horizontallyextending part communicating with the vaporizing chamber at a pointintermediate the ends thereof, a removable sediment trap in the lowerend of the vaporizing chamber, and a burner below the combustionchamber, the said vaporizing chamber being provided with a relativelythick wall having a passage extending vertically upward from the saidburner, second angularly arranged passage for connecting the top of thevaporizing chamber with the said first mentioned passage to permit thepassage of fuel from the vaporizing chamber to the said burner.

In testimony whereof we affix our signatures.

OTTO J. GROEHN. WILLIAM BLASKEWITZ.

and a

